What is Primary Koch's Infection?
The unspecific term "primary Koch's infection" is non-contagious lymph node tuberculosis in children.
perform gattermann kochs reaction on benzene. you will get an aldehyde. on the obtained aldehyde use tollens reagent. you will get a silvery white ppt. on performing gatterman kochs reaction on cyclohexane , this will yield no reaction. hence this is how you differentiate between benzene and cyclohexane
Secondary. A primary prevention aims a preventing infection or disease in the first place. For example, a polio vaccine is a primary prevention method. A secondary prevention is a screening test to prevent a bad outcome of a disease not necessarily the initial infection. So in the case of a pap smear, we're not aiming to prevent HPV infection, but we are trying to prevent cervical cancer which is a potential outcome. A helpful way…
What is the difference between an upper respiratory tract infection and a lower respiratory tract infection?
The primary difference is the location of the infection. An upper respiratory tract infection would include infection of the nose, nasal cavity, nasal and paranasal sinuses, and the larynx and pharynx. A lower respiratory tract infection would include infection of the trachea, bronchi or bronchial tree, and the lungs or pleural cavity.